The typically amusing sketch would have him become frustrated by his inability to think of the final line to well known songs such as "Twinkle Twinkle Little Star" and "Mary Had a Little Lamb", and react by banging his forehead on his piano's keyboard. However, a reporter observing him, Kermit the Frog, would then help Don by suggesting some suitable lyrics. As a result, Don would be inspired to suddenly come up with a whole alternative lyrical composition to the familiar children's songs, which he immediately plays with a full arrangement without any rehearsal with a line of backup singers that suddenly appear through the door to his studio or out of nowhere.
Don Music debuted in 1974. After reports that children were imitating him by banging their heads against things, Don was dropped from the show.
Don kept a picture of Sesame Streetsongwriter and composerJoe Raposo on the wall (although it was never actually identified as such), as well as a bust of Ludwig van Beethoven (possibly a reference to Schroeder) on his piano, which he addressed as "Ludwig" when apologizing for his failure as a composer or otherwise verbalizing his feelings. In at least one episode, the bust is of William Shakespeare, which he addressed as "Bill."